Techny Reservoir Dam
Key Takeaway
Techny Reservoir Dam is classified as significant hazard in Illinois. It was completed in 1979 and is 47 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 11 ft (taller than 8.1% in IL) |
| Dam Length | 544 ft |
| Dam Type | Earth |
| Max Storage | 350 acre-ft |
| Normal Storage | 100 acre-ft |
| Year Completed | 1979 (47 years old) |
| NID ID | IL01228 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
METROPOLITAN WATER RECLAMATION DISTRICT
Local Government
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Significant Hazard 10 ftFrequently Asked Questions
What is the hazard classification of Techny Reservoir Dam?
Techny Reservoir Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Techny Reservoir Dam?
Techny Reservoir Dam is owned by METROPOLITAN WATER RECLAMATION DISTRICT (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Techny Reservoir Dam built?
Techny Reservoir Dam was completed in 1979, making it 47 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Techny Reservoir Dam?
Techny Reservoir Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Techny Reservoir Dam?
Techny Reservoir Dam has a dam height of 11 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Techny Reservoir Dam last inspected?
Techny Reservoir Dam was last inspected on October 8, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.